ARM: defconfig: Enable ax88796c driver for Exynos boards

Enable ax88796c driver for the Ethernet chip on Exynos3250-based
ARTIK5 boards in exynos and multi_v7 defconfigs.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Link: https://lore.kernel.org/r/20201103151536.26472-6-l.stelmach@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>